Vibration absorber



Oct. 21, 1947.

. H. J. RUDOLPH VIBRATION ABSORBER- Filed NOV. 5, 1945 2 Sheets-Sheet lINVENTOR. H. J. RUDOLPH "W Y ATTORNEYS Oct. 21, 1947. H. J. RUDOLPH2,429,29

I viBnAnoN ABSORBER Filed Nov. 5, 1945 2 Sheets-Sheet 2 I N VEN TOR.

H.J. RUDOLPH ATTORNEYS Patented Oct. 21, 1947 VIBRATION ABSORBER HermanJ. Rudolph, Clovis, N. Mex., assignor to Phillips Petroleum Company, acorporation of Delaware Application November 5, 1945, Serial No. 626,6236 Claims. (o1. 1ss 26) One object of the invention is to provide adevice for reducing vibrations, or for absorbing vibrations.

Another object is to provide a smooth flowing gas stream fromcompressors.

Another object is to provide a vibration absorber with connections fortesting the operation of the vibration absorber.

Another object is to provide a vibration ab.-

chamber and'has restricted inlet opening [4 for receiving gas from 8.The walls of II are perforated with holes I5 and the bottom iii ofchamber II has a row of perforations preferably disposed around theperiphery.

Spaced in chamber 1 behind 16 with relation to inlet 8 is a funnelgenerally designated as I8.

sorber with means for removing condensate therefrom.

Another object is to provide a vibration absorber having suitable areasat all points whereby surging of the gas is quickly eliminated and thepulsations smoothed out into a steady flow of gas.

Another object is to provide a simple, easily constructed, inexpensive,fool proof vibration absorber.

Numerous other objects and advantages will be apparent to those skilledin the art upon reading the accompanying specification, drawings andclaims.

In the drawings:

Figure 1 is an elevational, cross sectional view through a' vibrationabsorber embodying the present invention.

Figure 2 is a. cross sectional view ofthe structure of Figure 1 takenalong the line 22, looking in the direction indicated.

Figure 3 is a cross sectional view of the structure of Figure 1 takenalong the line 33, looking in the direction indicated.

Figure 4 is a cross sectional view of the structure of Figure 1 takenalong the line 44, looking in the direction indicated.

In Figure 1 the vibration absorber generally designated as 5 consists ofa housing 6 having an enlarged chamber 1, inlet 8, and outlet 9. Thevibration absorber may be provided with flanges ill or other means forinserting it in an exhaust pipe.

' In side housing 6 is a perforated cup baflle ll spaced from the wallsof housing 8 by fins i2 and I3. Cup baflle I I may be regarded as anenlarged Funnel I8 is composed of pipe 19 and head 20. Funnel i8 isspaced from wall 6 by fins 2| and by plates 22 and 23 in combinationwith fins 24. Pipe i9 is perforated in the area shown with holes 25. V

Plate 22 is secured at its outer edge to the wall of housing 6, but hasan annular space 26 between it and pipe i9; whereas, plate 23 is securedat its inner end to pipe is and has a series of holes 21 adjacent wallof housing 6. The area ofannular space 26 and of all of th holes 21 ispreferably substantially the same.

.Ni'pples 28 and 29 are provided for the attachment of pressure gagesand drain nipples 30 and 3i are provided for draining condensate fromvibration absorber 5.

Operation The gas enters in the form of violent pulses through inlet 8;The area of i4 is smaller than the area of 8, but when combined with theannular area between B and II, it is greater than area 8. Therefore, thegas pulses coming in 8 are easily taken care of by passing through M oroutside of II. is greater than the area of It, so pressure waves cannotreflect in chamber ii.

The gases having passed through II are fairly well mixed and in somecases this would be a sufiicient vibration absorber. However, I preferto have the additional funnel member I8.

The area inside pipe I! plus the annular area between 6 and 20 isgreater than the annular area between H and 6' plus the area of holes I!so the gas has ample OppOrtunityto pass inside or outside of funnel iii.The gas passing outside l8, however, finds th area of 26 or 2] toorestricted and much of this gas is forced in through holes 25 to theinterior of pipe I9.

The area of holes 25 plus the area of 26 is smaller than the areaofoutlet pipe 9 so the outlet pipe is able to take care of the gases. Bythe time the gases reach the outlet pipe, the pulsations have beeneliminated.

From time to time, nipples 30 and 3| are opened to drain out condensate.However, a pipe may be attached to these nipples and run off to chambersor other means of disposal.

The area of holes i5 and i1 By attaching a pressure gage at 28 and oneat 28 (pressure gage not shown), it is easy to observe the operation ofthe vibration absorber as a gas at 8 will fluctuate violently while thatat 29 will be substantially steady. Nevertheless, the pressure readingof the two gases will be very close together as there is no unduethrottling of the now, but merely an elimination of the pulsation.

Nipples 2B and 29 remain closed except when it is desired to test thevibration absorber. If

gages at 28 and 29 show too great a pressure drop then the vibrationabsorber needs cleaning. If the gage at as begins to Jump, it indicatessomething has been blown out of the vibration absorber, suchas plate 85.

The reduction in vibration is a very valuable result of the presentinvention, as the type of vibration created by large compressors withoutusing the present invention has been found quite destructive, especiallyafter a period of time has passed sufficiently for pipes and other plantparts which are subjected to the vibration to crystallize due to what iscalled fatigue, and break.

Formal changes may be made in the specific embodiment oi the inventiondirected without departing from the spirit and substance of the broadinvention, the scope of which is commensurate with the appended claims.

Having described my invention, I claim:

1. A vibration absorber comprising in combination a housing having aninlet and an outlet, an enlarged chamber in the housing, a battlechamber in said enlarged chamber having walls spaced from said housing,said baflle chamber having a restricted opening disposed to receive aportion of the gases entering said inlet, and having a bottom,perforations in said walls and in said bottom, a perforated pipe mountedin said enlarged chamber behind said bottom from said inlet, said pipebeing spaced from the walls of said housing, an annular baiile platesecured to the inlet end of said pipe and extending toward the walls ofsaid housing, the exterior edge of said annular plate being turnedtoward said inlet and being the same distance from said housing as saidbaflle chamber, a plurality of baiile rings between said housing and theoutlet end of said pipe, a test connection in the inlet and outlet andcondensate drain plugs in said enlarged chamber.

' 2. A vibration absorber comprising in combination a housing having aninlet and an outlet, an enlarged'chamber in the housing, a baiiiechamher in said enlarged chamber having walls spaced from said housing,said bafiie chamber having a restricted opening disposed to receive aportion of the gases entering said inlet, and having a bottom,perforations in said walls and in said bottom, a perforated pipe mountedin'said enlarged chamber behind said bottom from said inlet, said pipebeing spaced from'the walls of said housing, and an annular bailie platesecured I d 7 3. A vibration absorber comprising in combination ahousing having an inlet and an outlet, an

enlarged chamber in the housing, a bafiie chamher in said enlargedchamber having walls spaced from said housing, said baifie chamberhaving a restricted opening disposed to receive a portion of the gasesentering said inlet, and having a bottom, perforations in said walls andin said bottom, a perforated pipe mounted in said enlarged chamberbehind said bottom from said inlet, said pipe being spaced from thewalls of said housing, and an annular baiiie plate secured to the inletend of said pipe and extending toward the walls of said housing.

a. A vibration absorber comprising in combination a housing having aninlet and an outlet and an enlarged chamber therebetween, a perforatedcup pane in said chamber the inlet area of said cup being smaller thanthe area of said inlet and less than the outlet area of said cup, butthe annular area around said cup plus the inlet area.v of said cup beinggreater than the area of said inlet, and a funnel in said chamber, thelarge end of said funnel being toward the inlet, baffle means betweenthe small end of said funnel and said chamber, said funnel beingperforated between the large end and the small end, the area of theannular space around said funnel plus the area of the small end of saidfunnel being greater than the annular area around said cup plus the areaof the perforations in the bottom of said cup, the area of the small andof said funnel being greater than the area of the perforations in saidfunnel and the area of the small end of said funnel plus the area ofopenings thereabout being less than the area of said outlet.

5. A vibration absorber comprising in combination a housing having aninlet and an outlet and an enlarged chamber therebetween, a perforatedcup bailie in said chamber and a funnel in said chamber, the large endof said funnel being toward the inlet, baiiie means between the smallend of said funnel and said chamber, said funnel being perforatedbetween the large end and the small and.

6. A vibration absorber comprising in combination a housing having aninlet and an outlet and an enlarged chamber therebetween, a perforatedcup baflie in said chamber the inlet area of said cup being smaller thanthe area of said inlet and less than the outlet area of said cup, butthe annular area around said cup plus the inlet area of said cup beinggreater than the area of said inlet.

HERMAN J. RUDOLPH.

REFERENCES;

The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 360,326 Richert Mar. 29, 1887696,277 Sponseller et al Mar. 25, 1902 2,401,570 Koehier June 4, 1946

